Piano string level



FIG. 1 is a perspective view of the piano string level;

FIG. 2 is a left side view of the piano string level;

FIG. 3 is a front view of the piano string level;

FIG. 4 is a rear view of the piano string level;

FIG. 5 is a bottom view of the piano string level;

FIG. 6 is a right side view of the piano string level; and,

FIG. 7 is a top view of the piano string level.

The ornamental design for a piano string level, as shown and described. 